/* Lattice Mico32 opcode support.  -*- C -*-
   Copyright 2008   Free Software Foundation, Inc.
   Contributed by Jon Beniston <jon@beniston.com>

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

/* -- opc.h */

/* Allows reason codes to be output when assembler errors occur.  */
#define CGEN_VERBOSE_ASSEMBLER_ERRORS

#define CGEN_DIS_HASH_SIZE 64
#define CGEN_DIS_HASH(buf,value) ((value >> 26) & 0x3f) 

/* -- asm.c */

/* Handle signed/unsigned literal.  */

static const char *
parse_imm (CGEN_CPU_DESC cd,
	   const char **strp,
	   int opindex,
	   unsigned long *valuep)
{
  const char *errmsg;
  signed long value;

  errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
  if (errmsg == NULL)
    {
      unsigned long x = value & 0xFFFF0000;
      if (x != 0 && x != 0xFFFF0000)
        errmsg = _("immediate value out of range");
      else
        *valuep = (value & 0xFFFF);
    }
  return errmsg;
}

/* Handle hi() */

static const char *
parse_hi16 (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  if (strncasecmp (*strp, "hi(", 3) == 0)
    {
      enum cgen_parse_operand_result result_type;
      bfd_vma value;
      const char *errmsg;

      *strp += 3;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
                                   &result_type, &value);
      if (**strp != ')')
        return _("missing `)'");

      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value = (value >> 16) & 0xffff;
      *valuep = value;

      return errmsg;
    }

  return parse_imm (cd, strp, opindex, valuep);
}

/* Handle lo() */

static const char *
parse_lo16 (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  if (strncasecmp (*strp, "lo(", 3) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 3;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
                                   &result_type, &value);
      if (**strp != ')')
        return _("missing `)'");
      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return parse_imm (cd, strp, opindex, valuep);
}

/* Handle gp() */

static const char *
parse_gp16 (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    long *valuep)
{
  if (strncasecmp (*strp, "gp(", 3) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 3;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_GPREL16,
                                   & result_type, & value);
      if (**strp != ')')
        return _("missing `)'");
      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return _("expecting gp relative address: gp(symbol)");
}

/* Handle got() */

static const char *
parse_got16 (CGEN_CPU_DESC cd,
	     const char **strp,
	     int opindex,
	     long *valuep)
{
  if (strncasecmp (*strp, "got(", 4) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 4;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_16_GOT,
                                   & result_type, & value);
      if (**strp != ')')
        return _("missing `)'");
      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return _("expecting got relative address: got(symbol)");
}

/* Handle gotoffhi16() */

static const char *
parse_gotoff_hi16 (CGEN_CPU_DESC cd,
		   const char **strp,
		   int opindex,
		   long *valuep)
{
  if (strncasecmp (*strp, "gotoffhi16(", 11) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 11;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_HI16,
                                   & result_type, & value);
      if (**strp != ')')
        return _("missing `)'");
      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return _("expecting got relative address: gotoffhi16(symbol)");
}

/* Handle gotofflo16() */

static const char *
parse_gotoff_lo16 (CGEN_CPU_DESC cd,
		   const char **strp,
		   int opindex,
		   long *valuep)
{
  if (strncasecmp (*strp, "gotofflo16(", 11) == 0)
    {
      const char *errmsg;
      enum cgen_parse_operand_result result_type;
      bfd_vma value;

      *strp += 11;
      errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LM32_GOTOFF_LO16,
                                   &result_type, &value);
      if (**strp != ')')
        return _("missing `)'");
      ++*strp;
      if (errmsg == NULL
          && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
        value &= 0xffff;
      *valuep = value;
      return errmsg;
    }

  return _("expecting got relative address: gotofflo16(symbol)");
}